so i saw a couple of people saying how they had a hard time finding all 12 ornaments so i thought i help!

Mrs. Claus's kitchen
1# is above the fridge hanging from the reef
2# is on the top shelf on the right side

flight training center
3# is in the first rain deer stable on the hay
4# is hanging of the first house in the roof jump landing platform

ice skating rink
5# is hanging on a door in the very left top corner
6# is hanging above the top left corner of the big screen

north pole train station
11# is behind the train hanging on a stick by the hole
8# is hanging on the left light on the ticket stand

Santa's workshop
7# is in right next to the third hanging light behind Santa
9# is on the rocking horse
10# is next to the sewing machine that the blonde elf is working at
12# is to the left of the elf on the latter